US2692030A

US2692030A - Metal foundation grate

Info

Publication number: US2692030A
Application number: US171437A
Authority: US
Inventors: Castelbianco Franco Bianchi Di
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-04-15
Filing date: 1950-06-30
Publication date: 1954-10-19
Anticipated expiration: 1971-10-19

Description

Ot- 19, 1954 F. B. DI cAsTELBlANc 2,692,030

METAL FOUNDATION GRATE Filed June 30, 1950 Patented Oct. 19, 1954 UNITED STATES PATENT OFFICE METAL FOUNDATION GRATE Franco Bianchi di Castelbianco, Milan, Italy Application June 30, 1950, Serial No. 171,437

Claims priority, application Italy April 15, 1950 4 claims. (ci. 18e- 21) The object of this invention is a metal tower foundation arrangement.

The metal foundation grate according to the invention is characterized by the fact that the under face of the grate is flat and devoid of any projections towards the bottom of the foundation pit, so as to have the grate resting on the pit bottom in the most suitable way, in order to obtain a uniform speciiic pressure.

rihis advantageous feature is obtained by buildup the grate from two or more spaced longitudinal bars provided with slots for receiving and supporting a niunber of cross bars, running perpendicularly to the two longitudinal bars, the said slots corresponding to the cross-section shape of the cross bars and having their lower side paraliel to the horizontal edges of the longitudinal bars.

rEhe cross bars are freely slidable in the Slots, avoiding the employment of joining bolts or wel-ded spots, so as to make the grate highly inexpensive to manufacture and unaffected by ground corrosion, which attacks small structural pieces. The component elements of the grate according to the invention are fully standardized, the mounting of the grate is every easy and quick and the grate is made adaptable to irregular foundation pits.

Two of the cross bars have suitably spaced notches formed therein for receiving the lower ends of the support uprights and for spacing the longitudinal bars of the grate, these latter being iixed to the ends of the uprights.

For a better understanding of the invention, reference is made to the attached drawing, showing as an illustrative example only, an embodiment of the new foundation arrangement.

In the drawing:

Fig. 1 is a side view of a tower foundation according to the present invention;

Fig. 2 is a cross sectional view on line 2--2 in Fig. l and Fig. 3 is a fragmentary sectional View on line 3 3 in Fig. 2.

Referring now to the drawings, the tower foundation comprises a rigid vertically extending supporting structure including four uprights 4i. The ends of the uprights t are nxedly secured by rivets 4a to two parallel substantially horizontal longitudinally extending spaced bars I. Each of the bars I has a vertical web or wall portion I' which is formed with longitudinally spaced openings 2. The openings 2 may have rectangular, triangular or L-shaped form, but in any event have a straight lower edge 2a extending substantially horizontal and parallel to the bottom edge ia of the bars l. A plurality of cross bars 3 are arranged in corresponding and aligned openings 2 in the two bars I with their horizontally extending walls 3 supported on the edges 2a. Two of the cross bars, namely the bars 3ra are formed with slots 5 which receive a web portion of the uprights A so that the transversely extending parallel bars 3a are iixedly secured to the longitudinal bars l and hold the same permanently in parallel and spaced position.

The angle bars 4, the bars l, and the xed cross bars 3a, provide a rigid structure, while the cross bars 3 are slidable in the openings 2 and can be shifted into positions conforming to an irregular shape ci the pit in which the tower foundation is placed. The horizontal walls 3 of the transversely extending cross bars 3 are adapted to be supported by the bottom of the pit. The cross bars 3 may be made from bent sheet metal.

The invention is not intended to be limited to the details of the illustrated embodiment, since various modifications may be made without departing from the spirit of the present invention.

What I claim is:

l. In a tower foundation arrangement to be placed in a pit and including four uprights, and two parallel substantially horizontal longitudinally extending spaced bars, each of said longitudinally extending bars secured to the spaced lower ends of two of said uprights so that said lower ends of said uprights are arranged in a rectangle, in combination, two vertical wall portions, one on each of said two horizontal longitudinally extending bars, each of said vertical wall portions formed with longitudinally spaced openings having a straight lower edge extending substantially horizontal, each opening in each of said vertical wall portions being transversely aligned with a corresponding opening in the other of said vertical wall portions; two parallel substantially horizontal transversally extending spaced bars secured at spaced points to said two parallel substantialiy horizontal longitudinally extending spaced bars so as to hold the same permanently in parallel spaced position and a plurality of transversely extending cross-bars loosely passing through aligned corresponding openings in said two longitudinally extending vertical wall portions shiftable in a transverse direction, each cross bar having a horizontally extending wall supported by the straight lower horizontal edges of two corresponding openings and adapted to be supported by a substantial horizontal surface on the bottom of a pit, said cross-bars being adapted to be individually transversely shifted to a position conforming with the irregularities of the walls of the pit.

ends of two of said uprights so that said lower endsl of said uprights are arranged in a rectangle, in combination, two vertical wall portions, one on each of said two horizontal longitudinally extending bars, each of said vertical Wall portions formed with longitudinally spaced openingsA havingl a straight lower edge extending substantially horizontal, each opening in each of said vertical wall portions being transversely aligned with a corresponding opening in the other of said vertical wall portions; and a plurality of transversely extending cross-bars passing through aligned corresponding openings in said two longitudinally extending Vertical wal1 portions, each cross-bar having a horizontally extending wall supported by the straight lower horizontal edges of two corresponding openings and adapted to be supported by a substantial horizontal surface on the bottom of a pit, two of said cross-bars extending in the region of the lower ends of said uprights, each of said two cross-bars being formed with two spaced slots, each of said slots located adjacent to the vertical wall portion of one of said longitudinally extending bars, each of said slots receiving a portion of the lower end of one of said uprights for permanently spacing said uprights and said longitudinally extending two bars, the others of said cross-bars being individually transversely shiftable in said openings to a position conforming with the irregularities of the walls of the pit.

3. A tower foundation arrangement comprising, in combination, a rigid vertically extending supporting structure; at least two spaced longitudinally extending substantially horizontal parallel bars rmly secured to the bottom end of said vertical supporting structure and formed with longitudinally spaced openings, each opening in each of said bars being transversally aligned with the corresponding opening with the other of said 4 bars; at least two spaced transversally extending bars secured at spaced points to said rigid vertical supporting structure so as to hold said spaced longitudinally extending substantially horizontal parallel bars permanently in fixed spaced position; and a plurality of transversely extending cross-bars loosely passing through aligned corresponding openings in said two longitudinally extending bars shiftable in a transversal direction. 4. A tower foundation arrangement comprising, in combination, a rigid vertically extending supporting structure; at least two spaced longitudinally extending substantially horizontal parallel bars rmly secured to the bottom end of said vertical supporting structure and formed with longitudinally spaced openings having each a straight lower edge extending substantially parallel to said bar so as to be substantially horizontal when said longitudinally extending bars are horizontally supported, each opening in each of said bars being transversally aligned with the corresponding opening with the other of said bars; at least two spaced transversally extending bars secured at spaced points to said rigid vertical supporting structure so as tohold said spaced longitudinally extending substantially horizontal parallel bars permanently in fixed spaced position; and a plurality of transversely extending cross-bars loosely passing through aligned corresponding openings in said two longitudinally extending bars shiftable in transversal direction, each cross-bar having at least one straight face opposite said straight lower edges of the openings through which it is passing.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,013,064 Rogers Dec. 26, 1911 1,132,021 Mark et al. 1 Mar. 16, 1915 1,428,230 Hess 1 Sept. 5, 1922 1,796,720 Porter Mar. 17, 1931 1,890,271 Umbricht Dec. 6, 1932